High precision signal measurement in wireless charging system
US11336116B2 · kind B2 · utility
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1References
13Claims
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Key dates
| Filing date | Jan 30, 2020 |
| Grant date | May 17, 2022 |
| Priority date | — |
| Expiry date | Feb 9, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless charging system is configured to charge one or more receiver devices simultaneously. The wireless charging system includes multiple coils that may be driven independently based on a feedback system with one or more feedback channels. One of the feedback channels may be a voltage and/or current measurement of coil driving signals from the coils that are indicative of receiver device presences on the wireless charging system. A coil driving signal may be sampled and processed using discrete Fourier transform to determine amplitude and phase information of the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.